I confess I didn't really properly know about this. Vegetables are losing nutrients due to climate change (it's implied it is also a monoculture issue). And the figures aren't small.

Vegetables are losing their nutrients. Can the decline be reversed?

A process called biofortification puts nutrients directly into seeds and could reduce global hunger, but it’s not a magic bullet

I don't have references to hand but I know these claims have been hotly contested.

There's so many layers to this that it's nearly impossible to grasp all of it, hard to imagine what the next 50 years will look like